Auth bypass in Fleetdm Fleet
CVE-2026-101047
Fleet before 4.87.0 does not protect the two endpoints that serve in-house iOS application packages and manifests (enterprise tier only) with the intended random, time-limited URL token. Because Apple's InstallEnterpriseApplication MDM command requires these URLs to be reachable without a Fleet session, they cannot rely on session-based authentication, and the missing token allows an unauthenticated attacker with network access to the Fleet server to download in-house IPA binaries and their metadata (bundle identifier, version, and name) by guessing sequential title identifiers. The impact is limited to read-only disclosure; there is no privilege escalation or write access, and the free tier is unaffected (it returns fleet.ErrMissingLicense).
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/fleetdm/fleet/security/advisories/GHSA-q9c5-pp7m-fm2g (vendor-advisory)
- www.vulncheck.com/advisories/fleet-before-4.87.0-unauthenticated-ios-app-downlo… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-101047?
- CVE-2026-101047 is a medium-severity vulnerability in Fleetdm Fleet, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-09-27.
- How severe is CVE-2026-101047?
- Medium severity. CVSS v3 base score is 5.3 out of 10.